Hitch module

ABSTRACT

A hitch module adapted to be coupled to a frame of a work machine or towed assembly. The hitch module includes a carrier assembly having a first plate and a second plate coupled to one another. The first and second plates are spaced from one another by a first distance, where both plates define a pivot axis. A guide assembly defines a longitudinal axis and is pivotally coupled to the carrier assembly about the pivot axis. The guide assembly has a first guide plate and a second guide plate coupled to and spaced by a second distance from one another. A hitch assembly is disposed at least partially between the first and second plate of the carrier assembly and the first and the second guide plate. The hitch link assembly is pivotal about the pivot axis and movable along the longitudinal axis.

CROSS REFERENCE TO RELATED APPLICATIONS

This Application is a continuation of U.S. patent application Ser. No.14/870,630 filed on Sep. 30, 2015 and titled “HITCH MODULE,” thedisclosure of which is incorporated herein by reference in its entirety.

FIELD OF THE DISCLOSURE

The present disclosure relates to a hitch module, and in particular, toa hitch module that can be adjusted to a plurality of orientations.

BACKGROUND OF THE DISCLOSURE

Work machines or towed assemblies often have rear hitch modules thatprovide a coupling location for a plurality of different towed devices.In addition to providing one or more coupling points, the hitch moduleis coupled to a frame to be sufficiently strong to pull the toweddevices under different load conditions. In order to accommodate heavyload conditions, the hitch module is typically fixedly mounted to theframe, i.e., the hitch module does not move substantially relative tothe frame. In this configuration, the hitch module must be correctlyaligned with the towed device in order to properly couple the hitchmodule thereto.

Properly aligning the hitch module with the towed device can bedifficult because of the weight/positioning of the towed device andbecause of the location of the hitch module on the work machine or towedassembly.

SUMMARY

In one embodiment of the present disclosure, a hitch module is adaptedto couple to a frame of a work machine or towed assembly. The hitchmodule includes a carrier assembly including a first plate and a secondplate coupled to one another, the first and second plates spaced fromone another by a first distance, where both plates define a pivot axis;a guide assembly defining a longitudinal axis and being pivotallycoupled to the carrier assembly about the pivot axis, the guide assemblyhaving a first guide plate and a second guide plate coupled to andspaced by a second distance from one another, where the second distanceis greater than the first distance; and a hitch assembly disposed atleast partially between the first and second plate of the carrierassembly and the first and the second guide plate, the hitch linkassembly being pivotal about the pivot axis relative to the carrierassembly and movable along the longitudinal axis relative to the guideassembly.

In one example of this embodiment, the hitch assembly is movable alongthe longitudinal axis relative to the guide assembly between a firstposition and a second position; and the guide assembly is pivotableabout the pivot axis in a first direction by a first angle relative tothe longitudinal axis and a second direction by a second angle relativethereto. In a second example, the hitch assembly includes a hitch linkthat is movable to a plurality of positions relative to the guideassembly and carrier assembly, the plurality of positions defined withina trapezoidal-shaped area having at least four points, wherein a firstpoint is at the first position and the first angle, a second point is atthe first position and the second angle, a third point is at the secondposition and the first angle, and a fourth point is at the secondposition and the second angle.

In a third example, a first through-hole is axially aligned through thefirst guide plate, the first through-hole being spaced a first radialdistance from the pivot axis; an arc-shaped through-hole is defined inthe first plate, the arc-shaped through-hole defined at the first radialdistance from the pivot axis; a second through-hole is defined in thehitch assembly; a third through-hole is defined in the second plate andat the first radial distance from the pivot axis; and a fourththrough-hole is defined in the second guide plate and axially alignedwith the first through-hole, the fourth through-hole is defined at thefirst radial distance from the pivot axis; wherein, the firstthrough-hole, the arc-shaped through-hole, and the second through-holeare aligned with one another when the hitch assembly is in the firstposition; further wherein, the first through-hole misaligned from thesecond through-hole when the hitch assembly is in the second position.

In a fourth example of this embodiment, the first through-hole, thearc-shaped through-hole, the second through hole, the third through holeand the fourth through-hole are aligned with one another when the hitchassembly is in the first position and the guide assembly is axiallyaligned with the longitudinal axis. In a fifth example, a pin is axiallyaligned with the first through-hole and configured to move axially alonga central axis defined by the first through-hole, the pin beingpositionable in at least a first axial position, a second axialposition, and a third axial position, wherein in the first axialposition, the hitch assembly is not in the first position and the pin isdisposed through a portion of the first through-hole and the arc-shapedthrough-hole; in the second axial position the hitch assembly is in thefirst position, the guide assembly is not axially aligned with thelongitudinal axis, and the pin is disposed through the firstthrough-hole, the arc-shaped through-hole, and the second through-hole;and in the third axial position, the hitch assembly is in the firstposition, the guide assembly is aligned with the longitudinal axis, andthe pin is disposed through the first through hole, the arc-shapedthrough-hole, the second through-hole, the third through-hole and thefourth through-hole.

In a sixth example of this embodiment, a U-shaped frame member iscoupled to the first guide plate, the U-shaped frame defining a pinthrough-hole; and a spring is disposed between the U-shaped frame memberand the first guide plate; wherein, the pin is disposed through the pinthrough-hole in the first, second, and third axial position; furtherwherein, the spring biases the pin towards the second guide plate. In aseventh example, the pin includes at least a first stop and a secondstop, the first stop limiting axial movement of the pin as it contactsthe U-shaped frame member, and the second stop limiting axial movementof the pin as it contacts the first guide plate. In an eighth example,when the pin is in the second axial position, the hitch assembly issubstantially restricted from moving out of the first position, and thehitch assembly and the guide assembly can pivot relative to the carriermember. In a ninth example, when the pin is in the third axial position,the hitch assembly is substantially restricted from moving out of thefirst position, and the hitch assembly and the guide assembly aresubstantially restricted from rotating relative to the carrier member.

In another example of this embodiment, the first plate and the secondplate terminate at a second radial distance from the pivot axis. In afurther example, the guide assembly further includes at least one spacercoupling the first guide plate to the second guide plate; and at leastone wear plate disposed between the first guide plate and the secondguide plate, the at least one wear plate having a radially-defined edgethat is disposed in contact with the first guide plate or second guideplate. In a different example, the hitch assembly includes a draw barhaving a defined length, width, and thickness, the thickness being lessthan the first and second distances; a hitch link adapted to be coupledto the frame; and a hitch link coupler coupling the hitch link to thedraw bar, the hitch link coupler including a grab bar.

In a further embodiment of the present disclosure, a hitch module isprovided for coupling to a frame of a work machine or work implement.The hitch module includes a carrier assembly including a first plate, asecond plate, and at least one coupler plate coupling the first andsecond plates to one another, the first and second plates being disposedparallel to and spaced from one another by a first distance, where apivot axis is defined through both the first and second plates; a guideassembly defining along a longitudinal axis and being pivotally coupledto the carrier assembly about the pivot axis, the guide assemblyincluding a first guide plate and a second guide plate coupled to andspaced by a second distance from one another, where the second distanceis greater than the first distance; and a hitch assembly disposed atleast partially between the first and second plates of the carrierassembly and the first and the second guide plates of the guideassembly, the hitch assembly including a draw bar and a hitch link;wherein, the hitch assembly is pivotal about the pivot axis relative tothe carrier assembly and movable along the longitudinal axis relative tothe guide assembly.

In one example of this embodiment, the hitch link is longitudinallymovable between a first position and a second position relative to theguide assembly; and the hitch link is pivotable about the pivot axisbetween a first angle and a second angle. In a second example, the hitchlink is movable to any one of a plurality of positions relative to theguide assembly and carrier assembly, the plurality of positions definedwithin a trapezoidal-shaped area formed by at least four points, whereina first point is at the first position and the first angle, a secondpoint is at the first position and the second angle, a third point is atthe second position and the first angle, and a fourth point is at thesecond position and the second angle.

In another example of this embodiment, a first through-hole is axiallyaligned through the first guide plate, the first through-hole beingspaced a first radial distance from the pivot axis; an arc-shapedthrough-hole is defined in the first plate, the arc-shaped through-holedefined at the first radial distance from the pivot axis; a secondthrough-hole is defined in the hitch assembly; a third through-hole isdefined in the second plate and defined at the first radial distancefrom the pivot axis; and a fourth through-hole is defined in the secondguide plate and axially aligned with the first through-hole, the fourththrough-hole defined at the first radial distance from the pivot axis;wherein, the first through-hole, the arc-shaped through-hole, and thesecond through-hole are aligned with one another when the hitch assemblyis in the first position; further wherein, the first through-holemisaligned from the second through-hole when the hitch assembly is inthe second position.

In a further example, a pin is axially aligned with the firstthrough-hole and configured to move axially along a central axis definedby the first through-hole, the pin being positionable in at least afirst axial position, a second axial position, and a third axialposition, wherein in the first axial position, the hitch assembly is notin the first position and the pin is disposed through a portion of thefirst through-hole and the arc-shaped through-hole; in the second axialposition the hitch assembly is in the first position, the guide assemblyis not axially aligned with the longitudinal axis, and the pin isdisposed through the first through-hole, the arc-shaped through-hole,and the second through-hole; and in the third axial position, the hitchassembly is in the first position, the guide assembly is aligned withthe longitudinal axis, and the pin is disposed through the first throughhole, the arc-shaped through-hole, the second through-hole, the thirdthrough-hole and the fourth through-hole.

In a different example, a method of coupling the hitch module to theframe includes providing a hitch coupler coupled to the frame of a workmachine; positioning the pin in its first axial position; maneuveringthe hitch link to any position within the trapezoidal-shaped area untilthe hitch link is aligned with the hitch coupler; coupling the hitchlink to the hitch coupler; moving the hitch assembly along thelongitudinal axis until it reaches the first distance from the carrierassembly; biasing the pin from its first axial position to its secondaxial position; aligning the hitch link such that the hitch link is notangularly disposed relative to the longitudinal axis; biasing the pinfrom its second axial position to its third axial position; and couplingthe hitch module to the frame.

In another embodiment of the present disclosure, a hitch module isprovided for coupling to a frame of a work machine or work implement.The hitch module includes a carrier assembly including a first plate, asecond plate, and at least one coupler plate coupling the first andsecond plates to one another, the first and second plates defining apivot axis and being disposed parallel to and spaced from one another bya first distance, where the first plate defines an arc-shapedthrough-hole that defines a central axis therethrough, the central axisbeing disposed a first radial distance from the pivot axis; a guideassembly being pivotally coupled to the carrier assembly about the pivotaxis, the guide assembly including a first guide plate, a second guideplate coupled to and spaced by a second distance from the first guideplate, at least two spacers, at least two wear plates disposed betweenthe first and second guide plates, a U-shaped frame member coupled tothe first guide plate, a pin axially movable relative to the first andsecond guide plates, and a spring disposed between the U-shaped framemember and the first guide plate, wherein the second distance is greaterthan the first distance; and a hitch assembly disposed at leastpartially between the first and second plates of the carrier assemblyand the first and the second guide plates of the guide assembly, thehitch assembly including an elongated draw bar, a hitch link coupler,and a hitch link adapted to be coupled to the frame, the hitch linkcoupler coupling the draw bar and hitch link to one another; wherein,the hitch assembly and guide assembly are pivotal about the pivot axisrelative to the carrier assembly; further wherein, the hitch assembly isslidably movable along a longitudinal axis relative to the carrierassembly and guide assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

The above-mentioned aspects of the present disclosure and the manner ofobtaining them will become more apparent and the disclosure itself willbe better understood by reference to the following description of theembodiments of the disclosure, taken in conjunction with theaccompanying drawings, wherein:

FIG. 1 is an elevated perspective view of a towed assembly with at leastone hitch module;

FIG. 2 is an isolated perspective view of one embodiment of a hitchmodule;

FIG. 3 is an isolated perspective view of a carrier assembly from thehitch module of FIG. 2;

FIG. 4 is an isolated perspective view of a guide assembly from thehitch module of FIG. 2;

FIG. 5 is an isolated perspective view of a hitch assembly from thehitch module of FIG. 2;

FIG. 6 is a topside view of the hitch module in several differentspatial orientations;

FIG. 7 is a longitudinal cross-section perspective view of the hitchmodule of FIG. 2;

FIG. 8a is a longitudinal cross-section perspective view of the hitchmodule of FIG. 2 with a pin in a first axial position;

FIG. 8b is a longitudinal cross-section perspective view of the hitchmodule of FIG. 2 with the pin in a second axial position;

FIG. 8c is a longitudinal cross-section perspective view of the hitchmodule of FIG. 2 with the pin in a third axial position;

FIG. 9 is a diagrammatical representation of a range of motion for ahitch link of the hitch module of FIG. 2;

FIG. 10 is an isolated perspective view of a second embodiment of ahitch module;

FIG. 11 is a cross-sectional perspective view of the hitch module ofFIG. 10;

FIG. 12 is an isolated perspective view of a third embodiment of the ahitch module in an open position;

FIG. 13 is an isolated perspective view of the hitch module of FIG. 12in a closed position;

FIG. 14 is a side view of one embodiment of a hitch module that can movein an up and a down direction;

FIG. 15 is a side view of another embodiment of a hitch module that canmove in an up and a down direction; and

FIG. 16a is a side view of one embodiment of a hitch module with a pincontact;

FIG. 16b is a side view of the hitch module of FIG. 16a with the pin inthe third axial position; and

FIG. 16c is a top view of the pin section of FIG. 16 a.

Corresponding reference numerals are used to indicate correspondingparts throughout the several views.

DETAILED DESCRIPTION

The embodiments of the present disclosure described below are notintended to be exhaustive or to limit the disclosure to the preciseforms in the following detailed description. Rather, the embodiments arechosen and described so that others skilled in the art may appreciateand understand the principles and practices of the present disclosure.

Referring to FIG. 1, a towed assembly 100 is shown. The towed assembly100 may have a frame 106 with a plurality of implements 108 coupledthereto and be configured to travel along an underlying surface. Theframe 106 may also have at least one wheel 110 coupled thereto. Thewheel 110 may space the frame 106 and the implements 108 a predefineddistance from the underlying surface to allow the implements 108 toengage the underlying surface as desired by a user. In one embodiment,the towed assembly 100 may require a work machine such as a tractor topull the towed assembly 100 along the underlying surface in order forthe implements 108 to engage the underlying surface.

In FIG. 1, one non-limiting example is shown of how a work machine ortractor may be coupled to the towed assembly 100. More specifically, thetowed assembly 100 may have a front end 102 and a rear end 104 that eachhave a hitch module 112 coupled thereto. The hitch module 112 at thefront end 102 may be configured to couple to the work machine, tractoror other pulling member to allow the towed assembly 100 to travel overthe underlying surface. Further, the hitch module 112 at the rear end104 of the towed assembly 100 may be configured to couple to a secondarytowed assembly (not shown), such as a nutrient or fertilizer applicator.

In one embodiment, a tillage implement such as a cultivator may becoupled behind a tractor, and the applicator (e.g., nutrient orfertilizer applicator or other chemicals) may be coupled to the hitchmodule 112 of the cultivator. The applicator includes a wheeled platformon which a tank is mounted; the tank holds and distributes chemicals(e.g. anhydrous ammonia) or solutions. In another embodiment, a seedplanter may be coupled to the rear of the work machine or tractor, andthen a chemical tank may be coupled to the hitch module 112 of the seedplanter. In these aforementioned embodiments, however, the order orarrangement of the implement and applicator may be switched such thatthe applicator is positioned between the work machine or tractor and theimplement. Other combinations of known implements and applicators may becoupled to one another or the work machine via a hitch module. As such,the work machine or tractor may drive both the towed assembly 100 andthe secondary towed assembly via the hitch modules 112 at both the frontend 102 and the rear end 104.

While hitch modules 112 for a towed assembly 100 have been describedabove, this disclosure is not limited to such a configuration. Morespecifically, the hitch modules described herein can be used in aplurality of different applications, and it is not limited to any oneapplication. For example, the hitch module can be coupled to a tractor,a truck, a car, a trailer, or any other device that may be removablycoupled to a towed assembly.

Referring now to FIG. 2, a hitch module 200 is shown isolated from anyframe member. The hitch module 200 may be composed of at least a carrierassembly 202, a guide assembly 204, and a hitch assembly 206. The guideassembly 204 may be pivotally coupled to the carrier assembly 202 insuch a way that allows the guide assembly 204 to pivot relative to thecarrier assembly 202 about a pivot axis 208. The pivot axis 208 may bedefined by a central portion of both the carrier assembly 202 and theguide assembly 204. Further, the hitch assembly 206 may be slidablycoupled to the guide assembly 204 along a longitudinal axis 210 definedalong the length of the hitch assembly 206. In the embodiment shown inFIG. 2, the longitudinal axis 210 may extend from a front portion 212 toa rear portion 214. However, the angular orientation of the longitudinalaxis 210 relative to front portion 212 and the rear portion 214 may alsobe altered as the guide assembly 204 pivots relative to the carrierassembly 202.

To better show the carrier assembly 202 of the hitch module 200described above, an isolated view of the carrier assembly 202 is shownin FIG. 3. More specifically, a first plate 302 and a second plate 304are shown parallel to, and spaced apart from, one another. The firstplate 302 and the second plate 304 can be spaced apart from one anotherto define a middle region 306 therebetween and have a first thickness320. The middle region 306 may be the distance the first and secondplates 302, 304 are spaced from one another. Further, the firstthickness 320 may be defined by the distance between the outermostsurfaces of the first plate 302 relative to the second plate 304.Further, the middle region 306 may be sufficiently sized to allow atleast a portion of the hitch assembly 206 to at least partially slidethere through.

At least one coupler plate 308 may be coupled to both the first plate302 and the second plate 304. The coupler plate 308 may be coupled to,and extend perpendicularly from, a surface of the second plate 304.Further, the coupled plate 308 may be coupled to the first plate 302 andthe second plate 304 to maintain the spacing of the middle region 306and the parallel alignment of the first plate 302 and the second plate304.

The first plate 302 may also have an arc-shaped through-hole 314 definedtherein. The arc-shaped through-hole 314 may be a through-hole followingan arc-shaped path defined in the first plate 302. The arc-shaped pathmay have a radius that is a first radial distance 316 from the pivotaxis 208. The arc-shaped through-hole 314 may also be positioned towardsthe front portion 212 of the first plate 302 and extend between a firstend wall 324 and a second end wall 326, which are defined in the firstplate 302.

Similarly, the second plate 304 may have a third through-hole 702 (FIG.7) disposed therein. The third through-hole 702 may be spaced the firstradial distance 316 from the pivot axis 208 and be substantiallycircular in shape. The third through-hole 702 may also define a centralaxis 322 that extends through the arc-shaped through-hole 314. Thecentral axis 322 may be aligned with and pass through the arc-shapedthrough-hole 314.

Both the front portion 212 and the rear portion 214 of the first plate302 and the second plate 304 may terminate at an arc-shaped radial edge310. Each arc-shaped radial edge 310 may be defined by an arc-shapedterminus of the respective first or second plate 302, 304 that is asecond radial distance 312 from the pivot axis 208. In one embodiment,the second plate 304 may have at least one safety through-hole 318positioned therein. The safety through-hole 318 may be sized to receivea secondary coupler (not shown) that can be coupled to the hitch module200. The secondary coupler may provide an additional means for couplingthe towed assembly to the hitch module 200.

Now referring to FIG. 4, the guide assembly 204 is more clearly shown.The guide assembly 204 may include a first guide plate 402 coupled to asecond guide plate 404 to define a second interior region 406. Thesecond interior region 406 may correspond in thickness with the firstthickness 320 of the carrier assembly 202. More specifically, the secondinterior region 406 may be sufficiently sized to allow at least aportion of the carrier assembly 202 to be disposed therein. In oneembodiment, the size of the second interior region 406 may be maintainedby spacers 408 disposed at each coupling location with couplers orfasteners 410.

In yet another embodiment, a wear plate 412 may be positioned along aninner surface of each the first and second guide plate 402, 404. Theguide assembly 204 may have multiple wear plates 412 disposed along thefirst and second guide plate 402, 404 at a first end 414 and a secondend 416. Each wear plate 412 may have a thickness that is substantiallythe same as the first and second plate 302, 304. Further, each wearplate 412 may have an inner concave surface 418 that correlates with thearc-shaped radial edge 310 of the respective first or second plate 302,304.

The spacers 408 and couplers 410 may position the wear plates 412 sothey are aligned with the first and second plate 302, 304 when thecarrier assembly 202 is disposed within the guide assembly 204. In oneembodiment, the wear plates 412 may be made of a material that reducesfriction between the inner concave surface 418 of the wear plates 412and the arc-shaped radial edge 310 of the first and second plate 302,304.

The first guide plate 402 may also have a U-shaped frame member 420coupled thereto. The U-shaped frame member 420 can be mechanicallycoupled to the first guide plate 402 and define an interior regionbetween the U-shaped frame member 420 and the first guide plate 402. TheU-shaped frame member 420 can also have defined therein a framethrough-hole 422 along a frame through-hole axis 424. Also aligned withthe frame through-hole axis 424 may be a first through-hole 426 and afourth through-hole 428. The first through-hole 426 may be definedthrough the first guide plate 402 and the fourth through-hole 428 may bedefined through the second guide plate 404. In one embodiment, the framethrough-hole 422, the first through-hole 426, and the fourththrough-hole 428 may all have approximately the same diameter and beaxially aligned with axis 424.

Also aligned with frame through-hole axis 424 may be a pin 430. The pin430 may have a substantially circular cross-section and a diameter thatis equal to or less than the diameter of the frame through-hole 422, thefirst through-hole 426, and the fourth through-hole 428. The pin 430 mayhave a first stop 432 and a second stop 436. The first stop 432 may bedisposed along a portion of the pin 430 that is outside of an interiorregion of the U-shaped frame member 420. The first stop 432 may contacta portion of the U-shaped frame member 420 when the pin 430 is in afully seated position. Further, when the pin 430 is in the fully seatedposition, the pin 430 may at least partially be disposed within thefourth through-hole 428.

Similarly, the second stop 436 may be disposed within the interiorregion of the U-shaped frame member 420. As shown in FIG. 4, theinterior region is defined between the U-shaped frame member 420 and thefirst guide plate 402. As such, the second stop 436 may be positionedalong the pin 430 to allow the pin 430 to become disposed in a firstaxial position 802 (FIG. 8). In the first axial position 802, the pin430 may be moved axially along the frame through-hole axis 424 until atip of the pin 430 terminates proximate to the first through-hole 426.

In one embodiment, the pin 430 may have a spring 438 disposed around thepin 430 and between the second stop 436 and the U-shaped frame member420 in the interior region. The spring 438 may provide a biasing forceto the second stop 436 to move the pin 430 axially toward the fourththrough-hole 428. The spring 438 may provide sufficient biasing force toposition the pin 430 in the fully seated position when the pin 430 isunencumbered along the frame through-hole axis 424.

Referring now to FIG. 5 the hitch assembly 206 is shown in more detailand isolated from the carrier assembly 202 and the guide assembly 204.The hitch assembly 206 may have a draw bar 502 coupled to a hitch link504 through one or more hitch link couplers 506. The draw bar 502 mayhave a base end 520 and a receiving end 522 and be substantiallyrectangular along a cross-section. The cross-section may have athickness 508 that corresponds in dimension with the middle region 306.That is to say, the thickness 508 of the draw bar 502 may besufficiently sized to allow the draw bar 502 to be disposed between thefirst and second plates 302, 304 of the carrier assembly 202.

A width 510 of the draw bar 502 may be sufficiently sized to allow thedraw bar 502 to become disposed between each of the spacers 408 alongthe longitudinal axis 210 of the guide assembly 204. In one embodiment,there may be two spacers 408 at both the first end 414 and the secondend 416 of the guide assembly 204. The spacers 408 at each end may bespaced to correspond with the width 510 of the draw bar 502 to allow thedraw bar 502 to be positioned therebetween while also maintainingalignment of the guide assembly 204 and the hitch assembly 206. That isto say, the spacers 408 may allow the draw bar 502 to slide axiallyalong the longitudinal axis 210 relative to the guide assembly 204, butthe spacers 408 may substantially limit the draw bar 502 from pivotingor moving transversely relative to the guide assembly 204. Rather, if atorsional force is applied to the draw bar 502, the torsional force maybe transmitted through the spacers 408 to the guide assembly 204.Accordingly, if a torsional force is applied to the hitch assembly 206,the hitch assembly 206 and the guide assembly 204 may rotate about thepivot axis 208 relative to the carrier member 202 as substantially oneassembly.

The draw bar 502 may also have a stop 512 disposed near the base endthereof. The stop 512 may be a piece of material protruding from atleast one surface of the draw bar 502 and that extends beyond thethickness 508 of the cross-section. Alternatively, a fastener (e.g.,screw, bolt head, washer, nut, etc.) may be used to form the stop 512.In any event, the stop 512 may be sized to contact a portion of theguide assembly 204 when the draw bar 502 is disposed therein andextended to a maximum position.

Alternatively, the draw bar 502 may have a through-hole 514 disposedproximate to a receiving end 522 of the draw bar 502. The through-hole514 may have a diameter that is greater than the diameter of the pin 430of the guide assembly 204. The second through-hole 514 may be positionedso when the draw bar 502 is disposed within the guide assembly 204 andaxially positioned at a minimum position relative to the guide assembly204, the pin 430 can be positioned at least partially in the secondthrough-hole 514.

The hitch link coupler 506 may couple the draw bar 502 to the hitch link504. The hitch link coupler 506 may be welded, bolted, riveted, orotherwise coupled to the draw bar 502 on one side, and removably coupledto the hitch link 504 on the other side. More specifically, the hitchlink coupler 506 may define two through-holes (not shown) therethroughthat correspond with through holes (not shown) of the hitch link 504.Further still, lockpins 516 or other fasteners may be positioned througheach of the two through-holes to couple the hitch link 504 to the hitchlink coupler 506.

In one embodiment, the hitch link coupler 506 may be two plates coupledto one another. One of the plates may have a substantially 90 degreebend disposed about a distal end relative to the hitch link 504 to forma grab bar 518. The grab bar 518 may be manipulated by a user to alterthe location of the hitch link 504.

Referring now to FIG. 6, the hitch module 200 is shown with the firstguide plate 402 removed and with the guide assembly 204 and hitch linkassembly 206 in several different configurations. More specifically, thehitch module 200 is shown with the hitch assembly 206 in a firstposition 602, a second position 604, a third position 606, a fourthposition 608, a fifth position 610, and a sixth position 612.

In the second position 604, the longitudinal axis 210 defined by thehitch assembly 206 may be aligned with a carrier axis 614 defined alonga midpoint of the carrier assembly 202. The hitch assembly 206 may bedisposed at a neutral angle relative to the carrier member 202 when thelongitudinal axis 210 and the carrier axis 614 align. Further, the hitchlink 504 may be spaced a first distance 616 from the carrier assembly202 in the second position 604. The first distance 616 may be theminimum axial distance along the longitudinal axis 210 allowable betweenthe hitch link 504 and the carrier assembly 202. Further still, when thehitch link 504 is spaced by the first distance 616 from the carriermember 202, the through-hole 514 may be substantially aligned with thearc-shaped through-hole 314.

When the guide assembly 204 and the hitch assembly 206 are in the firstposition 602, the hitch link 504 may be spaced the first distance 616from the carrier assembly 202 and the longitudinal axis 210 may beoriented at a positive offset angle 618 from the carrier axis 614. Thepositive offset angle 618 may be the maximum positive angular positionof the guide assembly 204 and the hitch assembly 206 relative to thecarrier assembly 202 about the pivot axis 208. The positive offset angle618 may also position the second through-hole 514 proximate to thesecond end wall 326 of the arc-shaped through-hole 314. In thisorientation, when the pin 430 is positioned partially in the arc-shapedthrough-hole 314 it may at least partially contact the second end wall326 to restrict any further movement in the positive angular direction.

Similarly, when the guide assembly 204 and the hitch assembly 206 are inthe third position 606, the hitch link 504 may be spaced the firstdistance 616 from the carrier assembly 202 and the longitudinal axis 210may be oriented at a negative offset angle 620 from the carrier axis614. For purposes of this disclosure, positive offset angle 618 orpositive angle refers to an angular displacement of the hitch assemblyor hitch link 504 relative to the carrier axis 614. Likewise, negativeoffset angle 620 or negative angle also refers to an angulardisplacement of the hitch assembly or hitch link 504 relative to thecarrier axis 614. The use of the terms “positive” and “negative” mayalso be interchangeably referred to as clockwise and counter clockwise,respectively. In other words, this disclosure uses positive and negativeoffset angles to refer to an angular or pivotal direction relative tothe carrier axis 614.

The negative offset angle 620 may be the minimum negative rotation ormaximum counter clockwise rotation of the guide assembly 204 and thehitch assembly 206 relative to the carrier assembly 202 along the pivotaxis 208. The negative offset angle 620 may also position thethrough-hole 514 proximate to the first end wall 324 of the arc-shapedthrough-hole 314. In this orientation, when the pin 430 is positionedpartially in the arc-shaped through-hole 314 it may at least partiallycontact the first end wall 324 to restrict any further movement in thenegative angular direction.

The fifth position 610 shows the guide assembly 204 and the hitchassembly 206 in the neutral angle orientation with the hitch link 504spaced a second distance 622 from the carrier assembly 202. While thehitch link 504 is spaced the second distance 622, the guide assembly 204and the hitch assembly 206 may rotate about the pivot axis 208 betweenthe positive offset angle 618 and the negative offset angle 620 asdescribed above. Further, the hitch assembly 206 may be restricted frommoving any farther from the carrier assembly 202 because of contactbetween the third stop 512 and the wear plates 412 and/or the guideassembly 204. That is to say, the draw bar 502 may not extend anyfurther than the second distance 622 along the longitudinal axis 210because the third stop 512 may at least partially contact the wearplates 412 and/or the guide assembly 204 when the draw bar 502 is spacedat the second distance 622.

The relationship of the wear plates 412 with the arc-shaped radial edge310 is also more clearly shown in FIG. 6. More specifically, the innerconcave surface 418 of the wear plates 412 may be concentric with thepivot axis 208. Similarly, the arc-shaped radial edges 310 of the firstand second plate 302, 304 may also be concentric with the pivot axis208. In this embodiment, as the guide assembly 204 and the hitchassembly 206 rotate between the positive offset angle 618 and thenegative offset angle 620, the wear plates 412 may slide along thearc-shaped radial edge 310 of the first and second plate 302, 304.

While the draw bar 502 and hitch link 504 have been described withrespect to the first and second distances 618, 622 and the positive andnegative offset angles 618, 620, this disclosure is not limited to theparticular orientations described and shown. More specifically, the drawbar 502 or hitch link 504 can be positioned at any location between thefirst distance 616 and the second distance 622. Further still, the guideassembly 204 and the hitch assembly 206 can be disposed at manydifferent angles relative to the carrier assembly 202 and thisdisclosure is not limited to any particular angular orientation.

Now referring to FIG. 7, a cross-sectional view along the longitudinalaxis 210 is shown. More specifically, FIG. 7 shows the hitch module 200in the neutral angle with the hitch assembly 206 at the first distance616 from the carrier assembly 202. In one embodiment, this may be theonly orientation of the hitch module 200 that allows each of the throughholes 422, 426, 314, 514, 702, and 428 to be axially aligned with oneanother along the frame through-hole axis 424. In the embodiment shownin FIG. 7, the pin 430 (not shown in FIG. 7) may become disposed througheach of the through-holes 422, 426, 314, 514, 702, and 428 therebysubstantially locking or coupling the hitch module 200 in its neutralangular position with the hitch assembly 206 at the first distance 616from the carrier assembly 202.

While the through-holes 422, 426, 314, 514, 702, and 428 have beendescribed in the above embodiment as only being aligned in oneparticular orientation, this disclosure is not limited to such aconfiguration. More specifically, there may be multiple positions wherethrough-holes can align with one another to allow a pin to becomedisposed therethrough to maintain the orientation of the hitch module200. In one non-limiting example, through-holes can be axially alignedat the positive offset angle 618 and the negative offset angle 620.Through-holes may also be positioned with the hitch assembly 206 in theminimum or maximum position, or at any location therebetween.Through-holes can be defined at many different locations to allow thehitch module 200 to be substantially locked in many differentorientations. Accordingly, this disclosure is not limited to anyparticular number or location of through-holes capable of locking thehitch module 200 in a particular position or orientation.

The positioning of the pin 430 along the frame through-hole axis 424 mayalso determine the available movement of the hitch link 504 relative tothe carrier assembly 202. More specifically, the pin 430 may be orientedin the first axial position 802 as shown in FIG. 8a , a second axialposition 804 as shown in FIG. 8b , and a third axial position 806 asshown by FIG. 8 c.

In the first axial position 802 the pin 430 is disposed through only aportion of the first through-hole 426 and the arc-shaped through-hole314. In the first axial position 802, the guide assembly 204 and thehitch assembly 206 may rotate about the pivot axis 208 relative to thecarrier assembly 202. However, in the first axial position 802 the pin430 may be at least partially disposed in the arc-shaped through-hole314. Accordingly, the guide assembly 204 and the hitch assembly 206 mayonly pivot between the positive offset angle 618 and the negative offsetangle 620 as permitted by the arc-shaped through-hole 314. Morespecifically, in the positive offset angle 618, the pin 430 may contactthe first end wall 324 of the arc-shaped through-hole 314 tosubstantially restrict any further rotation in that direction relativeto the carrier assembly 202. Similarly, in the negative offset angle620, the pin 430 may contact the second end wall 326 of the arc-shapedthrough-hole 314 to substantially restrict any further rotation in thatdirection relative to the carrier assembly 202.

When the pin 430 is in the first axial position 802, the hitch assembly206 may also be positioned at any distance between the first distance616 and the second distance 622 relative to the carrier assembly 202.More specifically, the pin 430 may be at an axial position that does notinterfere with the movement of the draw bar 502. Moreover, unless thepin 430 becomes disposed in the second through-hole 514 of the draw bar502, the draw bar 502 may be able to move axially along the longitudinalaxis 210 any distance between the first distance 616 and the seconddistance 622. Further, in the first axial position 802 the hitch module200 may become disposed at any angular orientation between the positiveoffset angle 618 and the negative offset angle 620.

When the pin 430 is in the second axial position 804, the hitch assembly206 may be substantially disposed and held at the first distance 616from the carrier assembly 202. In the second axial position 804, theguide assembly 204 may pivot between any angular disposition between thepositive offset angle 618 and the negative offset angle 620. Morespecifically, as shown in FIG. 8b , the pin 430 is disposed through thefirst through-hole 426, the arc-shaped through-hole 314, and the secondthrough-hole 514. Similar to the first axial position 802, when the pin430 is in the second axial position 804, the guide assembly 204 and thehitch assembly 206 may be oriented at any angular position relative tothe carrier assembly 202 between the positive offset angle 618 and thenegative offset angle 620. The pin 430 may be positioned through thearc-shaped through-hole 314 but is diametrically sized to slide orotherwise move therein until the pin 430 contacts the first or secondend wall 324, 326 as described in more detail above.

In the second axial position 804, the pin 430 may be at least partiallydisposed within the second through-hole 514 of the draw bar 502. In thisconfiguration, the pin 430 may substantially lock the draw bar 502 atthe first distance 616 from the carrier assembly 202. That is to say, inthe second axial position 804, the hitch module 200 may pivot betweenthe positive offset angle 618 and the negative offset angle 620 but thehitch assembly 206 may be substantially restricted from moving axiallyalong the longitudinal axis 210.

Now referring to the third axial position 806 as shown in FIG. 8c , thehitch assembly 206 may be substantially locked at the first distance 616with the guide assembly 204 at the neutral angle. In the third axialposition 806, the pin 430 may be disposed through the first through-hole426, the arc-shaped through-hole 314, the second through-hole 514, thethird through-hole 702 and the fourth through-hole 428. In thisposition, the pin 430 may substantially lock both the guide assembly 204and the hitch assembly 206 to the carrier assembly 202 in theirrespective positions. More specifically, the hitch assembly 206 may bemaintained in the neutral angle because the pin 430 creates a secondpivot axis (the central axis 322) for the hitch assembly when the pin430 is disposed through the third through-hole 702. When a force isapplied to the hitch module 504 in the negative or positive offset angle618, 620, the guide assembly 204 may try to pivot about both the centralaxis 322 and the pivot axis 208, which are offset from one another,thereby binding the guide assembly 204 and substantially restricting anymovement out of the neutral angle.

As described in more detail above, the spring 438 (not shown in FIGS.8a, 8b, and 8c ) may bias the pin 430 axially towards the fourththrough-hole 428. In other words, the spring 438 may bias the pin 430towards the third axial position 806. In one embodiment, the user mayprovide a force to the pin 430 that sufficiently opposes the biasingforce of the spring 438 to transition the pin 430 from the third axialposition 806 to the first or second axial positions 802, 804. While theuser holds the pin 430 in the first axial position 802, the hitchassembly 206 may be moved out of the neutral angle and to a distanceother than the first distance 616. After the hitch assembly 206 is moveaway from the first distance 616, the user may release the pin 430 andallow the biasing force of the spring 438 press the pin 430 axially intoa top surface of the draw bar 502.

The pin 430 may have an end 808 that is chamfered, rounded, or otherwisesmooth and that contacts the top surface of the draw bar 502 when thepin 430 is in the first axial position 802 and the spring 438 isproviding the axially biasing force. The end 808 may be smooth enoughand the biasing force of the spring 438 may be small enough to allow thedraw bar 502 to slide axially along the longitudinal axis 210 betweenthe first distance 616 and the second distance 622. However, once thehitch assembly 206 becomes disposed at the first distance 616, the pin430 may become axially aligned with the second through-hole 514 and thebiasing force of the spring 438 may force the pin 430 at least partiallyinto the second through-hole 514, thereby substantially locking thehitch assembly 206 at the first distance 622 from the carrier assembly202.

Once the pin 430 becomes disposed in the second through-hole 514,however, the end 808 of the pin 430 may contact a top surface of thesecond plate 304 if the hitch module 200 is not in the neutral angle.That is to say, the pin 430 will not be aligned with the thirdthrough-hole 702 if the longitudinal axis 210 is not aligned with thecarrier axis 614. Further, when the pin 430 is not aligned with thethird through-hole 702, the biasing force of the spring 438 and the end808 of the pin 430 may be configured to slide along the top surface ofthe second plate 304 as the hitch assembly 206 moves between either thepositive offset angle 618 or the negative offset angle 620 intoalignment with the longitudinal axis 210 and the carrier axis 614 in theneutral angle. If the hitch module 200 becomes positioned in the neutralangle, the biasing force of the spring 438 may be sufficient totransition the pin 430 at least partially into the third and fourththrough-holes 702, 428. In other words the pin 430 may transition fromthe second axial position 804 to the third axial position 806 therebylocking the hitch module 200 in the neutral angle and the first distance616 relative to the carrier assembly 202.

In one nonexclusive example, the hitch module 200 may be coupled to theframe 106 of the towed assembly 100. The user may manipulate the towedassembly 100 to align the hitch module 200 with a hitch coupler of awork machine or with another towed assembly. The user may then positionthe pin 430 of the hitch module 200 in the first axial position 802 andmanipulate the hitch link 504 to become aligned with the hitch coupler.As the user manipulates the hitch link 504, the hitch module 200 maybecome disposed in any configuration between the positive offset angle618 and the negative offset angle 620 and the first distance 616 and thesecond distance 622. The user may then couple the hitch link 504 to thehitch coupler. Once the hitch link 504 is coupled to the hitch coupler,the user may back the work machine towards the towed assembly 100. Asthe work machine is backed toward the towed assembly 100, the hitchcoupler may force the hitch assembly 206 along the longitudinal axis 210to the first distance 616 from the carrier assembly 202. Once the hitchassembly 206 is at the first distance 616, the biasing force of thespring 438 may transition the pin 430 to the second axial position 804,thereby locking the hitch assembly 206 at the first distance 616.

The user may then direct the work machine away from the towed assembly100 along a linear path. As the towed assembly 100 becomes aligned alongthe linear path of the work machine, the longitudinal axis 210 of thehitch assembly 206 may become aligned with the carrier axis 614 wherethe hitch module 200 is in the neutral angle. Once the hitch assembly206 is in the neutral angle, the biasing force of the spring 438 mayposition the pin 430 in the third axial position 806 thereby locking thehitch module 200 in the neutral angle and in the second position 604.

In one embodiment, the axial position of the pin 430 may control thepotential movement of the hitch module 200 as described above. Forexample, when the pin 430 is in the first axial position 802, the hitchassembly 206 may move between the first distance 616 and the seconddistance 622 and also move between the positive offset angle 618 and thenegative offset angle 620. However, when the pin 430 is in the secondaxial position 804 the hitch assembly 206 may be locked the firstdistance 616 but still positionable at any location between the positiveoffset angle 618 and the negative offset angle 620. Finally, in thethird axial position 806, the pin 430 may substantially restrictmovement of the hitch assembly 206 both in the negative and/or positiveoffset angle 618, 620 and between the first and second distance 616,622. In one non-limiting aspect of this embodiment, one lockingmechanism (i.e., the pin 430) may substantially lock both the distanceand the angle of the hitch assembly 206 relative to the carrier assembly202.

In one embodiment, the hitch link 504 may be positionable at anylocation relative to the carrier assembly 202 between the positiveoffset angle 618, the negative offset angle 620, the first distance 616and the second distance 622. The range of the hitch link 504 is shownmore clearly in FIG. 9. More specifically a first point 902 may be thelocation of the hitch link 504 when the hitch assembly 206 is in thepositive offset angle 618 and at the first distance 616. A second point904 may be the location of the hitch link 504 when the hitch assembly206 is in the negative offset angle 620 and at the first distance 616. Athird point 906 may be the location of the hitch link 504 when the hitchassembly 206 is at the positive offset angle 618 and the second distance622. Finally, a fourth point 908 may be the location of the hitch link504 when the hitch assembly 206 is at the negative offset angle 620 andthe second distance 622.

An internal area 910 may be defined between the points 902, 904, 906,908. The hitch link 504 may be positionable at any location within theinternal area 910 when the pin 430 is in the first axial position 802.Further, in one non-limiting example, a first difference 912 between thefirst point 902 and the second point 904 may be about 13.5 inches. Asecond difference 914 between the third point 906 and the fourth point908 may be, for example, about 22 inches. Finally, a third difference916 along the longitudinal axis 210 may be about 11 inches. Thesedimensions are only provided as an example and are not intended to limitthe scope of this disclosure. Moreover, the internal area 910 of FIG. 9may form a substantially trapezoidal shape to accommodate the pluralityof positions at which the hitch assembly may be disposed for couplingthe hitch module to a frame of a work vehicle or towed assembly.

Another embodiment may involve a method of assembling the hitch module200. The method may include providing the carrier assembly 202, theguide assembly 204, and the hitch assembly 206 and placing the secondguide plate 404 on a work surface (not shown) to define the longitudinalaxis 210. The wear plates 412 can then be aligned at the first end 414and the second end 416 of the second guide plate 404. The second plate304 may be positioned on top of the second guide plate 404 with thelongitudinal axis 210 disposed along a middle section of the secondplate 304. The second plate 304 may be positioned between the wear plate412 at the first end 414 and the wear plate 412 at the second end 416.

The draw bar 502 may then be aligned with the longitudinal axis 210 andplaced on the second plate 304 at a location where the base end 520extends from the rear portion 214 of the second plate 304 and thereceiving end 522 extends from the front portion 212 of the second plate304. The first plate 302 may then be aligned with the longitudinal axis210 along a middle section of the first plate 302. The front and rearportion 212, 214 of the first plate 302 may be aligned with the frontand rear portion 212, 214 of the second plate 304. Further, additionalwear plates 412 may be aligned with the longitudinal axis 210. One wearplate 412 may be positioned proximate to the rear portion 214 of thefirst plate 302 and one wear plate 412 may be positioned proximate tothe front portion 212 of the first plate 302. The first guide plate 402may be aligned with the longitudinal axis 210 and the first guide plate402 may then be positioned on top of the first plate 302 and each wearplate 412.

Next, the spacers 408 may be positioned between the wear plates 412 andthe first and second guide plate 402, 404. The couplers 410 may then bepositioned through the first guide plate 402, the wear plates 412 andthe spacers 408, and through the second guide plate 404. The couplerplate 308 may be coupled to the first plate 302 and/or the second plate304. The pin 430 can then be at least partially positioned through theframe through-hole 422. Further, the spring 438 may be positioned to atleast partially encompass the portion of the pin 430 positioned betweenthe U-shaped frame member 420 and the first guide plate 402. The firststop 432 can then be coupled to the pin 430 at an outer portion of theU-shaped frame member 420 and the second stop 436 can be coupled to thepin 430 at a location proximate to the spring 438. More particularly,the second stop 436 can be positioned at a location along the pin 430that positions the pin 430 between the second stop 436 and the U-shapedframe member 420.

While a method of assembling the hitch module 200 has been described indetail above in a sequential manner, the particular orientation of eachassembly step is not limited. A person having skill in the artunderstands that the steps of assembly can be sequenced in a pluralityof different orders without straying from these teachings. Accordingly,this disclosure is not limited to any particular sequence of assembly.

Referring now to FIG. 10, a different embodiment of a hitch module 1000is shown. The hitch module 1000 may have a frame 1002 and a subframe1004 coupled to one another. Further, the hitch module 1000 may define acavity 1006 in which a hitch assembly 1008 can be positioned. Further,the hitch module 1000 may have a first engagement pin (not shown) and asecond engagement pin 1012 positionable through the frame 1002, subframe1004, and/or the hitch assembly 1008.

In one embodiment, the hitch assembly 1008 may have a longitudinal slot1014 disposed therein. Further, the subframe 1004 may have a firstarc-shaped slot 1016 disposed therein. In this embodiment, the secondengagement pin 1012 may be disposed through both the first arc-shapedslot 1016 and the longitudinal slot 1014. The cross-sectional view shownin FIG. 11 more clearly illustrates the relationship of the secondengagement pin 1012 and the hitch module 1000. More specifically, asecond and third arc-shaped slot 1018, 1020 are shown defined by theframe 1002.

Also shown in FIG. 11 is a tapered body 1022 coupled to the secondengagement pin 1012. The tapered body 1022 may have a small diameter anda large diameter (not specifically referenced). The small diameter maybe sized to travel within the second arc-shaped slot 1018. The largediameter portion of the tapered body 1022 may travel along a top surfaceof the frame 1002 when the second engagement pin 1012 is not disposed ina central portion of the second arc-shaped slot 1018. However, when thetapered body 1022 becomes aligned with the central portion of the secondarc-shaped slot 1018, the tapered body 1022 may fall into a central bore(not shown) defined in the second arc-shaped slot 1018. Once the largediameter portion of the tapered body 1022 is disposed within the centralbore, the second engagement pin 1012 may then be substantially locked inthe central portion of the second arc-shaped slot 1018.

When the hitch assembly 1008 is locked in the central portion of thesecond arc-shaped slot 1018 as described above, the hitch assembly 1008may still move axially along the longitudinal slot 1014. Morespecifically, the longitudinal slot 1014 may be defined along the lengthof the hitch assembly 1008 and be sized to allow the second engagementpin 1012 to pass therethrough. Accordingly, even when the secondengagement pin 1012 is locked in the central position, the hitchassembly 1008 can move axially along the longitudinal slot 1014. Inaddition to the engagement between the longitudinal slot 1014 and thesecond engagement pin 1012, the hitch assembly 1008 may be held in axialalignment by rollers (not shown). The rollers can be located along afront end of the hitch module 1000 to maintain the position of the hitchassembly 1008. In one embodiment, when the second engagement pin 1012 isnot disposed in the central portion the hitch assembly 1008 may pivotbetween the rollers to become disposed in several angular orientationsrelative to the frame 1002.

The first engagement pin may be positioned substantially between therollers. Further, the first engagement pin may correspond withthrough-holes (not shown) defined in the hitch assembly 1008. In oneembodiment, the first engagement may be selectably positionable in oneof a plurality of through holes in the hitch assembly 1008 to allow thehitch assembly 1008 to extend away from the frame 1002 to a plurality ofdistances.

The embodiments shown and described for FIGS. 10 and 11 may allow thehitch assembly 1008 to be adjusted both radially and axially relative tothe frame 1002. Further, this embodiment may allow the hitch assembly1008 to be substantially locked both radially and axially relative tothe frame 1002.

FIGS. 12 and 13 illustrate a hitch module 1200 that utilizes many of thefeatures of the hitch module 1000 of FIGS. 10 and 11 but also includes alock plate 1202 to maintain the hitch assembly 1008 in longitudinalalignment. More specifically, the lock plate 1202 may have a cut-out1204 defined therein. The cut-out 1204 may substantially correspond withthe dimensions of the hitch assembly 1008. The lock plate 1202 may bepivotally coupled to the frame 1002 to be positionable between an openposition 1206 and a closed position 1302. In the open position 1206, thelock plate 1202 may not substantially restrict the hitch assembly 1008from rotating relative to the frame 1002. However, in the closedposition 1302 the lock plate 1202 may be positioned so the hitchassembly 1008 is located at least partially within the cut-out 1204 andis thereby substantially restricted from moving radially relative to theframe 1002.

FIG. 14 shows yet another embodiment where the hitch module 200 may alsopivot in an up direction 1402 and a down direction 1404. In thisembodiment, one or more bar linkage 1406 may couple the coupler plate308 to a pivot plate 1408. The pivot plate 1408 may be pivotally coupledto a hitch member 1410 at a hitch pivot 1412. The pivot plate 1408 maypivot about the hitch pivot 1412 to move the hitch module 200 in the updirection 1402 and the down direction 1404. In one aspect of thisembodiment, the pivot plate 1408 may also be pivotally coupled to acylinder 1414 at a shaft end 1416. The cylinder 1414 may further bepivotally coupled to the hitch member 1410 at a base end 1418.

The cylinder 1414 may have a variable stroke and the distance betweenthe base end 1418 and the shaft end 1416, or the cylinder length, maychange. As the cylinder 1414 length changes, the pivot plate 1408 andthe hitch module 200 may move in the up direction 1402 or the downdirection 1404 correspondingly. The cylinder 1414 may be a hydrauliccylinder, an electric actuator, a pneumatic cylinder, a bolt and nutconfiguration, or any other similar apparatus that can vary length.

The embodiment shown in FIG. 15 may be substantially the same asdescribed above for FIG. 14 with a few exceptions. For instance, insteadof coupling the pivot plate 1408 to the coupler plate 308 with the barlinkage 1406, the embodiment of FIG. 15 may be pivotally coupled to thepivot plate 1408 to the coupler plate 308 at a coupler plate axis 1502.The coupler plate 308 may also have a coupler pin 1504 positionedthrough an arc-shaped pivot through-hole 1506. The arc-shaped pivotthrough-hole 1506 may be a through-hole defined along an arc centred atthe coupler plate axis 1502.

In this embodiment, the hitch module 200 may pivot relative to the pivotplate 1408. More specifically, the coupler plate 308 may pivot about thecoupler plate axis 1502 relative to the pivot plate 1408 as long as thecoupler pin 1504 remains within the arc-shaped pivot through-hole 1506.Accordingly, the embodiment of the hitch module 200 shown in FIG. 15 maypivot about the hitch pivot 1412 via the cylinder 1414 and may alsopivot about the coupler plate axis 1502 as long as the coupler pin 1504remains within the arc-shaped pivot through-hole 1506.

Referring now to FIGS. 16a and 16b , another embodiment of the hitchmodule 200 is shown where a pin contact 1602 may be positioned along thehitch assembly 206. In the embodiment shown in FIG. 16, the pin 430 mayhave a radial extrusion 1608 that extends radially from the central axis322. The radial extrusion 1608 may be positioned axially along the pin430 at a location that is just above the frame member 420 when the pin430 is in the first axial position 802 as shown in FIG. 16a . Further,the frame through-hole 422 may have a notched portion 1610 thatcorresponds in size with the radial extrusion 1608 of the pin 430. Inthis embodiment, the pin 430 may only be transitioned into, or out of,the first axial position 802 when the radial extrusion 1608 of the pin430 is aligned with the notched portion 1610 of the frame through-hole422.

In one embodiment, the pin 430 may also have a pin arm 1612 defined at adistal portion of the pin 430 relative to the hitch assembly 206. Thepin arm 1612 may define a pin arm axis 1606 that extends perpendicularlyfrom the central axis 322. In the embodiment shown in FIG. 16a , the pin430 may be maintained in the first axial position 802 by aligning theradial extrusion 1608 with the notched portion 1610, sliding the pin 430to the first axial position 802, and rotating the pin 430 so the radialextrusion 1608 is no longer aligned with the notched portion 1610. Inthis configuration, the radial extrusion 1608 of the pin 430 may contacta portion of the frame through-hole 422 and resist the axially biasingforce of the spring 438. Further, from this position, the pin 422 maynot be axially moved to either the second axial position 804 or thethird axial position 806 until the pin 430 is rotated to align theradial extrusion 1608 of the pin 430 with the notched portion 1610 ofthe frame through-hole 422.

In one embodiment, the pin contact 1602 may be coupled to the hitchassembly 206. The pin contact 1602 may be an arc-shaped member extendingfrom the hitch link coupler 506 to a pin bumper 1604 at a distal end.The pin bumper 1604 may be spaced to align with the pin arm 1612 whenthe pin 430 is in the first axial position 802. The pin bumper 1604 mayfurther be positioned to contact the pin arm 1612 when the pin arm axis1606 is not parallel with the longitudinal axis 210. Further, the pinbumper 1604 may also be positioned to rotate the pin arm axis 1606 intoparallel alignment with the longitudinal axis 210 when the hitchassembly 206 is the first distance 616 from the carrier assembly 202.

In one nonexclusive embodiment, the pin 430 may be in the third axialposition 806. The user may align the radial extrusion 1608 with thenotched portion 1610 and pull the pin 430 axially to the first axialposition 802. The user may then rotate the pin 430 so the pin arm axis1606 is no longer parallel with the longitudinal axis 210. The user maythen release the pin 430 and allow the radial extrusion 1608 tosubstantially rest on portions of the frame through-hole 422 to maintainthe pin 430 in the first axial position 802. The user may thenmanipulate the hitch link 504 to couple to a hitched assembly while thepin 430 is retained in the first axial position 802. The user may thenengage a work machine to transition the hitch assembly 206 to the firstdistance 616. As the hitch assembly 206 is transitioned to the firstdistance 616, the pin bumper 1604 of the pin contact 1602 may contactthe pin arm 1612 and begin to rotate the pin arm axis 1606 into parallelalignment with the longitudinal axis 210, thereby aligning the radialextrusion 1608 with the notched portion 1610. Once the hitch assembly206 is positioned at the first distance 616, the pin bumper 1604 mayhave rotated the pin arm axis 1606 sufficiently to align the radialextrusion 1608 with the notched portion 1610, thereby allowing the pin430 to become axially positioned in either the second axial position 804or the third axial position 806.

While certain axes have been defined and there particular orientation toone another has been described in detail, this disclosure is not limitedto any particular axial alignments. More specifically, any number ofaxes and alignments could be used to align a radial extrusion with anotched portion of a through-hole and the particular orientationsdescribed is not limiting. Further, while the pin contact 1602 has beendescribed as arc-shaped, the particular shape of the pin contact 1602 isnot limiting. A person skilled in the art understands the many shapes inwhich the pin contact could be formed to achieve substantially the sameresult. Further still, multiple radial extrusions and correspondingnotched sections could be used instead of just one.

In yet another embodiment of this disclosure, the pin 430 may have aposition sensor (not particularly shown) positioned thereon. Morespecifically, the second stop 436 may have a tab or other feature thatprovides an axial position indication of the pin 430. The positionsensor may be disposed along a top portion of the first guide plate 402at a location that allows the position sensor to determine the positionof the tab or other feature. In this non-limiting example, as the pin430 moves axial positions, the tab of the second stop 436 moves axiallywith the pin 430 thereby providing a basis for the position sensor todetermine the overall axial position of the pin 430. This disclosure isnot limited to such a configuration for the position sensor and manyother types of sensors and locations are also considered herein.

The position sensor may provide a signal to the user of the specificaxial orientation of the pin 430. The signal may be an audible soundfrom a speaker or a visual indication such as illuminating a light on aninstrument panel. More specifically, the position sensor may identifywhen the pin 430 is in the first axial position 802 or the third axialposition 806 and send a corresponding signal to the user as describedabove. In another embodiment, the position sensor may also provide asignal to the user when the pin 430 is in the second axial position 804.The position sensor may be a proximity sensor with an integrated circuitpackage having a laser beam transmitter, receiver, and detectorcircuits. Alternatively, inductive proximity sensors may be used alongwith any other similar sensor known in the art to detect a distancebetween two objects. Many different types of sensors and locations ofthe sensors are considered herein and this disclosure is not limited toany particular type of sensor or signal.

While embodiments incorporating the principles of the present disclosurehave been described hereinabove, the present disclosure is not limitedto the described embodiments. Instead, this application is intended tocover any variations, uses, or adaptations of the disclosure using itsgeneral principles. Further, this application is intended to cover suchdepartures from the present disclosure as come within known or customarypractice in the art to which this disclosure pertains and which fallwithin the limits of the appended claims.

1. An adjustable hitch, comprising: a frame configured to be coupled toa work machine; a first slot defined through the frame; a hitch assemblyselectively coupled to the frame; a longitudinal slot defined throughthe hitch assembly; and a first engagement pin defined through both thefirst slot and the longitudinal slot.
 2. The adjustable hitch assemblyof claim 1, further comprising a subframe coupled to the frame andhaving a second slot defined therethrough.
 3. The adjustable hitchassembly of claim 2, further wherein the first engagement pin ispositioned through the second slot.
 4. The adjustable hitch assembly ofclaim 3, further comprising a third slot defined through the frame,wherein the first engagement pin is positioned through the third slot.5. The adjustable hitch assembly of claim 1, further wherein the firstengagement pin has a tapered body.
 6. The adjustable hitch assembly ofclaim 5, further wherein the tapered body a small diameter portion and alarge diameter portion, wherein the large diameter portion can only fitthrough the first slot at a central bore.
 7. The adjustable hitchassembly of claim 6, further comprising a second engagement pin that isselectively positionable within a through-hole defined in the frame. 8.A hitch system, comprising: a frame configured to be coupled to a workmachine; a hitch assembly selectively coupled to the frame; and a lockplate pivotally coupled to the frame and defining a cutout; wherein, thelock plate has a first position where the hitch assembly is notpositioned in the cutout and a second position where the hitch assemblyis at least partially positioned within the cutout.
 9. The hitch systemof claim 8, further wherein when the lock plate is in the firstposition, the hitch assembly is pivotable relative to the frame.
 10. Thehitch system of claim 8, further wherein when the lock plate is in thesecond position, the hitch assembly is not pivotable relative to theframe.
 11. The hitch system of claim 8, further comprising alongitudinal slot defined through the hitch assembly.
 13. The hitchsystem of claim 11, further comprising: a first engagement pin; a firstslot defined through the frame; a subframe coupled to the frame; and asecond slot defined through the subframe; wherein, the first engagementpin is positioned through first slot, the second slot, and thelongitudinal slot.
 14. The hitch system of claim 13, further comprisinga second engagement pin that is selectively positionable within athrough-hole defined in the hitch assembly.
 15. The hitch system ofclaim 14, further wherein when the lock plate is in the first positionthe second engagement pin is not positioned in the through-hole and whenthe lock plate is in the second position, the second engagement pin ispositioned at least partially within the through-hole.
 16. An adjustablehitch component, comprising: a frame configured to be coupled to a workmachine; a first slot defined through the frame; a hitch assemblyselectively coupled to the frame; a longitudinal slot defined throughthe hitch assembly; a first engagement pin defined through both thefirst slot and the longitudinal slot; and a lock plate pivotally coupledto the frame and defining a cutout; wherein, the lock plate has a firstposition where the hitch assembly is not positioned in the cutout and asecond position where the hitch assembly is at least partiallypositioned within the cutout.
 17. The adjustable hitch component ofclaim 16, further comprising: a subframe coupled to the frame and havinga second slot defined therethrough; a third slot defined through theframe; wherein, the first engagement pin is positioned through both thesecond slot and the third slot.
 18. The adjustable hitch component ofclaim 16, further comprising: a second engagement pin that correspondswith a through-hole defined in the hitch assembly; wherein, when thelock plate is in the first position the second engagement pin is notpositioned in the through-hole and when the lock plate is in the secondposition, the second engagement pin is positioned at least partiallywithin the through-hole.
 19. The adjustable hitch component of claim 16,further wherein when the lock plate is in the first position, the hitchassembly is pivotable relative to the frame and when the lock plate isin the second position, the hitch assembly is not pivotable relative tothe frame.
 20. The adjustable hitch component of claim 16, furtherwherein the first engagement pin has a tapered body with a smalldiameter portion and a large diameter portion, wherein the largediameter portion can only fit through the first slot at a central bore.